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X-ray properties of protostars in the Orion Nebula
L. Prisinzano, G. Micela, E. Flaccomio +8
The origin and evolution of the X-rays in very young stellar objects (YSOs) are not yet well understood since it is very hard to observe YSOs in the protostellar phase. We study th…
Kinematics of NGC 2264: signs of cluster formation
Gabor Furesz, Lee W. Hartmann, Andrew H. Szentgyorgyi +7
We present results from 1078 high resolution spectra of 990 stars in the young open cluster NGC 2264, obtained with the Hectochelle multiobject echelle spectrograph on the 6.5m MMT…
The lower mass function of the young open cluster Blanco 1: from 30 Mjup to 3 Mo
Estelle Moraux, Jerome Bouvier, John Stauffer +2
We performed a deep wide field optical survey of the young (~100-150 Myr) open cluster Blanco1 to study its low mass population well down into the brown dwarf regime and estimate i…
SPITZER: Accretion in Low Mass Stars and Brown Dwarfs in the Lambda Orionis Cluster
D. Barrado y Navascues, J. R. Stauffer, M. Morales-Calderon +6
We present multi-wavelength optical and infrared photometry of 170 previously known low mass stars and brown dwarfs of the 5 Myr Collinder 69 cluster (Lambda Orionis). The new phot…
Near and Mid-IR Photometry of the Pleiades, and a New List of Substellar Candidate Members
John R. Stauffer, Lee W. Hartmann, Giovanni G. Fazio +13
We make use of new near and mid-IR photometry of the Pleiades cluster in order to help identify proposed cluster members. We also use the new photometry with previously published p…
A Spitzer Spectrum of the Exoplanet HD 189733b
C. J. Grillmair, D. Charbonneau, A. Burrows +5
We report on the measurement of the 7.5-14.7 micron spectrum for the transiting extrasolar giant planet HD 189733b using the Infrared Spectrograph on the Spitzer Space Telescope. T…